// This code is derived from jcifs smb client library <jcifs at samba dot org>
// Ported by J. Arturo <webmaster at komodosoft dot net>
//  
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
using SharpCifs.Dcerpc.Ndr;
using SharpCifs.Util;

namespace SharpCifs.Dcerpc
{
    public class DcerpcBind : DcerpcMessage
    {
        internal static readonly string[] ResultMessage =
        {
            "0",
            "DCERPC_BIND_ERR_ABSTRACT_SYNTAX_NOT_SUPPORTED",
            "DCERPC_BIND_ERR_PROPOSED_TRANSFER_SYNTAXES_NOT_SUPPORTED",
            "DCERPC_BIND_ERR_LOCAL_LIMIT_EXCEEDED"
        };

        internal static string GetResultMessage(int result)
        {
            return result < 4 ? ResultMessage[result] : "0x" + Hexdump.ToHexString(result, 4);
        }

        public override DcerpcException GetResult()
        {
            if (Result != 0)
            {
                return new DcerpcException(GetResultMessage(Result));
            }
            return null;
        }

        internal DcerpcBinding Binding;

        internal int MaxXmit;

        internal int MaxRecv;

        public DcerpcBind()
        {
        }

        internal DcerpcBind(DcerpcBinding binding, DcerpcHandle handle)
        {
            this.Binding = binding;
            MaxXmit = handle.MaxXmit;
            MaxRecv = handle.MaxRecv;
            Ptype = 11;
            Flags = DcerpcConstants.DcerpcFirstFrag | DcerpcConstants.DcerpcLastFrag;
        }

        public override int GetOpnum()
        {
            return 0;
        }

        /// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
        public override void Encode_in(NdrBuffer dst)
        {
            dst.Enc_ndr_short(MaxXmit);
            dst.Enc_ndr_short(MaxRecv);
            dst.Enc_ndr_long(0);
            dst.Enc_ndr_small(1);
            dst.Enc_ndr_small(0);
            dst.Enc_ndr_short(0);
            dst.Enc_ndr_short(0);
            dst.Enc_ndr_small(1);
            dst.Enc_ndr_small(0);
            Binding.Uuid.Encode(dst);
            dst.Enc_ndr_short(Binding.Major);
            dst.Enc_ndr_short(Binding.Minor);
            DcerpcConstants.DcerpcUuidSyntaxNdr.Encode(dst);
            dst.Enc_ndr_long(2);
        }

        /// <exception cref="SharpCifs.Dcerpc.Ndr.NdrException"></exception>
        public override void Decode_out(NdrBuffer src)
        {
            src.Dec_ndr_short();
            src.Dec_ndr_short();
            src.Dec_ndr_long();
            int n = src.Dec_ndr_short();
            src.Advance(n);
            src.Align(4);
            src.Dec_ndr_small();
            src.Align(4);
            Result = src.Dec_ndr_short();
            src.Dec_ndr_short();
            src.Advance(20);
        }
    }
}
